Week picker for android

content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java

Index: content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java b/content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java
new file mode 100644
index 0000000000000000000000000000000000000000..4f637c68d1f37cf59fd5eeb09e55c0e2e1170a5c
--- /dev/null
+++ b/content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java
@@ -0,0 +1,155 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.content.browser.input;
+
+import android.content.Context;
+import android.text.format.DateUtils;
+import android.view.accessibility.AccessibilityEvent;
+import android.widget.FrameLayout;
+import android.widget.NumberPicker;
+
+import java.util.Calendar;
+
+import org.chromium.content.R;
+
+// This class is heavily based on android.widget.DatePicker.
+public class TwoFieldDatePicker extends FrameLayout {
+
+    protected NumberPicker mPositionInYearSpinner;
+
+    protected NumberPicker mYearSpinner;
+
+    protected OnMonthOrWeekChangedListener mMonthOrWeekChangedListener;
+
+    // It'd be nice to use android.text.Time like in other Dialogs but
+    // it suffers from the 2038 effect so it would prevent us from
+    // having dates over 2038.

[Miguel Garcia, 2013/06/11 13:02:52]

no protected members please, make accessors if you need them but I don't think
you will need them, as per the remaining comments.

[keishi, 2013/06/12 13:23:07]

Done. I had to add some accessors.

+    protected Calendar mMinDate;
+
+    protected Calendar mMaxDate;
+
+    protected Calendar mCurrentDate;
+
+    /**
+     * The callback used to indicate the user changes\d the date.
+     */
+    public interface OnMonthOrWeekChangedListener {
+
+        /**
+         * Called upon a date change.
+         *
+         * @param view The view associated with this listener.
+         * @param year The year that was set.
+         * @param positionInYear The month or week in year.
+         */
+        void onMonthOrWeekChanged(TwoFieldDatePicker view, int year, int positionInYear);
+    }
+
+    public TwoFieldDatePicker(Context context) {
+        super(context, null, android.R.attr.datePickerStyle);
+        mCurrentDate = Calendar.getInstance();
+    }
+
+    /**
+     * Initialize the state. If the provided values designate an inconsistent
+     * date the values are normalized before updating the spinners.
+     *
+     * @param year The initial year.
+     * @param positionInYear The initial month <strong>starting from zero</strong> or week in year.
+     * @param onMonthChangedListener How user is notified date is changed by
+     *            user, can be null.
+     */
+    public void init(int year, int positionInYear,
+            OnMonthOrWeekChangedListener onMonthOrWeekChangedListener) {
+        setCurrentDate(year, positionInYear);
+        updateSpinners();
+        mMonthOrWeekChangedListener = onMonthOrWeekChangedListener;
+    }
+
+    public boolean isNewDate(int year, int positionInYear) {
+        return (getYear() != year || getMonthOrWeek() != positionInYear);
+    }
+
+    /**
+     * Updates the current date.
+     *
+     * @param year The year.
+     * @param positionInYear The month or week in year.
+     */
+    public void updateDate(int year, int positionInYear) {
+        if (!isNewDate(year, positionInYear)) {
+            return;
+        }
+        setCurrentDate(year, positionInYear);
+        updateSpinners();
+        notifyDateChanged();
+    }
+
+    protected void setCurrentDate(int year, int positionInYear) {
+    }
+
+    @Override
+    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
+        onPopulateAccessibilityEvent(event);
+        return true;
+    }
+
+    @Override
+    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
+        super.onPopulateAccessibilityEvent(event);
+
+        final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR;
+        String selectedDateUtterance = DateUtils.formatDateTime(getContext(),
+                mCurrentDate.getTimeInMillis(), flags);
+        event.getText().add(selectedDateUtterance);
+    }
+
+    /**
+     * @return The selected year.
+     */
+    public int getYear() {
+        return mCurrentDate.get(Calendar.YEAR);
+    }
+
+    /**
+     * @return The selected month or week.
+     */
+    public int getMonthOrWeek() {
+        return 0;
+    }
+
+    /**
+     * Gets a calendar bootstrapped with the value of a given calendar.
+     *
+     * @param oldCalendar The old calendar.
+     */
+    protected Calendar getCalendar(Calendar oldCalendar) {
+        Calendar newCalendar = Calendar.getInstance();
+        newCalendar.setFirstDayOfWeek(Calendar.MONDAY);
+        newCalendar.setMinimalDaysInFirstWeek(4);
+        if (oldCalendar == null) {
+          newCalendar.setTimeInMillis(0);
+        } else {
+          newCalendar.setTimeInMillis(oldCalendar.getTimeInMillis());
+        }
+        return newCalendar;
+    }
+
+    /**
+     * This method should be subclassed to update the spinners based on mCurrentDate.

[Miguel Garcia, 2013/06/11 13:02:52]

make this abstract, it does require an implementation.

[keishi, 2013/06/12 13:23:07]

Done.

+     */
+    protected void updateSpinners() {
+    }
+
+    /**
+     * Notifies the listener, if such, for a change in the selected date.
+     */
+    protected void notifyDateChanged() {
+        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED);
+        if (mMonthOrWeekChangedListener != null) {
+            mMonthOrWeekChangedListener.onMonthOrWeekChanged(this, getYear(), getMonthOrWeek());
+        }
+    }
+}